Stone breaker



g- 16, 1938- V c. v. HALLENBECK 2,127,027

STONE BREAKER Filed May 2; 1955 2 Sheets-Sheet 1 A9 1N VENTOR.

CHAPL 5 K HALLE/VEECA ATTORNEY.

16, 1933' I c. v. HALLENBECK 2,127,027

STONE BREAKER Filed May 2, 1935 2 Sheets-Sheet 2 'INVENTOR. (WA/PL 5 MHA1: fA/BfC/f JZIORNEY.

Patented Aug. 16, 1938 UNITED STATES PATENT OFFICE STONE BREAKER 1Claim.

This invention relates to improvements in rock breakers of the typeemployed for breaking rock for macadam, for aggregate and for otherpurposes.

The principal object of this invention, generally stated, is to producea breaker mechanism comprising a stationary jaw and a movable jaw, andin which the movable jaw has a movement, at the edge where the materialis fed to the crusher, which is preponderantly a movement towards andaway from the stationary jaw was to produce a pinching effect only onthe large rocks, and which movement is combined with a downwardcomponent which increases towards the discharge edge, while thetransverse movement decreases, until at the point of material discharge,the surface of the movable jaw has an up and down movement only.

Experience has shown that large rocks and boulders do not need adownward movement of the crushing jaw to feed them into the crusherjaws, but that they do need a maximum movement towards and away from thestationary jaw to produce the necessary pinching effect. As the stonesare broken into small fragments, they require less pinching action and agreater amount of progressive movement, and my improved crusher isdesigned to produce such action.

The objects of this invention more specifically stated are:

To produce a rock crusher that operates with the least amount ofineffective movement;

To reduce the weight of the movable parts and the actuating mechanism toa minimum so as to reduce vibration;

To reduce friction to a minimum;

To simplify the construction by reducing the sizes and number ofmachined parts.

It is also an object of this invention to produce a rock breaker of suchconstruction that it can be easily erected at any place where it is tobe used so as to reduce the cost and labor required to change thelocation thereof.

Another object is to provide a rock breaker of such construction thatthe feed opening shall be as low as practicable so as to facilitate thefeeding of material thereto.

A further object is to provide a rock breaker in which the stationaryjaw shall have a crusher surface that is downwardly and forwardlyinclined to such an extent that it will be self-cleaning.

A still further object is to provide a rock breaker of such constructionthat the bearings and mechanism connected with the movable jaw shall belocated underneath the jaw for the purpose of reducing the total heightof the machine.

The above and other objects that will become apparent as thisdescription proceeds and to which attention will be called, are attainedby means of a construction and an arrangement of parts that will now bedescribed and reference for this purpose will be had to the accompanyingdrawings in which the preferred construction of the machine has beenillustrated, and in which Figure 1 is a top plan View of the machine.

Figure 2 is a vertical section taken on line 2-2, Figure 1.

Figure 3 is a section taken on line 3-3, Figure 2.

Figure 4 is a section taken on line 4-4, Figure 2, and

Figure 5 is a side elevation of the machine, a portion of the side Wallbeing broken away to show the course of the material through the jaws.

The machine consists of a massive cast steel frame having spacedparallel side Walls 6 and 1, connected at their front edges by an endwall 8 whose surface 9 is downwardly and forwardly inclined. Along thelower edge of the end wall is a flange Ill whose upper edge is inclinedso as to cooperate with the inclined lower edge of a removable crusherplate II. A removable wedge I2 is secured to the end wall by means ofbolts l3, and serves to attach the crusher plate to the stationary jaw.

The sides 6 and l are connected at their rear ends by an end wall I4whose upper edge has a .wide flange l5 that projects to both sidesthereof, and which has an opening l6 through which the pitman l'lextends. Sides 6 and I extend rearwardly beyond the end wall l4 and areprovided with bearings l8 for the ends of shaft 19, and with a centralbearing l8a.

The rearwardly extending portions of the side walls are connected by anend wall 20. The sides 6 and I and the end Wall have wide flanges 2|along their lower edges on which the frame rests, and these areconnected near the front end of the frame by a transverse flange 22. Theends of the side flanges 2| are curved upwardly in the form of sledrunners so as to facilitate the movement of the machine.

The transverse flange 22 is provided with upwardly extending spaced lugs23 that are perforated for the reception of a shaft 24 which alsoextends through openings in side walls 6 and 1. A movable jaw 25 isprovided near its lower and forward end with downwardly extending lugs26 that have openings through which the shaft 24 passes, and which arepositioned between the lugs 23 and the side walls 6 and 'l, as shown inFigure 4.

The movable jaw is provided near its upper edge with downwardlyextending spaced lugs that are perforated for the reception of a shaftor pivot pin 28, which also extends through an opening in the upper endof pitman ll, as shown most clearly in Figure 3.

The pitman has its lower end branched and the two branches 29 arepositioned between bearings l8 and 18a and have bearings for thereception of the eccentric cylindrical portions 30 of the shaft l9. Whenshaft l9 rotates the jaw 25 will be rocked about the pivot 24 towardsand away from the stationary jaw member. The upper surface of themovable jaw has a flange Illa that 00- operates with the lower edge ofthe removable crusher plate 3!, whose upper edge is secured to the jawby means of a wedge l2a, as shown in Figure 2.

A shaft 32 extends between the sides 6 and 7 and carries a roller 33 forthe conveyor belt 38. The shaft l9 has each end provided with a heavyfly wheel 34, and one of these may have a pulley 35 to which power canbe transmitted for operating the machine, or the belt may be applieddirectly to one of the fly wheels.

When shaft I9 is rotated in either direction, the movable jaw is rockedabout its pivot 24 through the action of the pitman and the cocentrics30, and every point in the movable jaw will move in the arc of a circlewhose center is the center the shaft 24, as indicated by arrows inFigure 2.

The movable jaw is provided with upwardly extending sides 36 whichprevent crushed material or broken rock from falling over the edges ofthe jaw, and this prevents material from piling up underneath the jawand protects the bearings located underneath the jaw.

When rocks are fed into the feed opening and pass or project into thespace between the adjacent surfaces of the crushing plates H and 3|,they will drop down as far as their size will permit, and when themovable jaw approaches the stationary jaw, therocks will be broken intosmaller pieces which will move farther down and will be again broken,and this will continue until the rocks have been reduced to such smallpieces that they will pass through the space between the lower edges ofthe jaws and crusher plates and onto the conveyor belt.

If a large rock, like that indicated by reference numeral 37 in Figure5, is delivered to the jaws, it will be raised and lowered by themovement of the jaw 25, and will be turned until the jaws succeed ingetting a hold so as to break off a piece, after which the operationwill continue until the large piece has been reduced in sizesufficiently to permit the pieces to pass into the space between thejaws.

At this point, attention will be called to a very important feature ofthe construction, namely, the inclination of the jaws. From Figures 2and 5, it will be seen that the crushing surface of the stationary jawis downwardly and forwardly inclined, and this prevents crushed rocksand clay from sticking to the crushing surface as it ordinarily does ifthe crushing surface of the stationary jaw is vertical.

Since the material rests on the upper surface of the movable jaw, it isevident that the movement of material along the surface thereof willserve to keep the material from sticking. By inclining the crushingsurfaces of the jaws as shown in the drawings, the height of the machinecan also be greatly reduced with the consequent advantage to be derivedtherefrom.

The movement of the jaw 25, which is obtained by rocking it about apivot located near its lower end and to the rear of the crushingsurface, gives a downward movement to the material near the dischargeedges of the jaws and an upward movement at the top which facilitatesthe crushing or breaking. The downward movement of the surface of thecrushing jaw increases progressively towards the discharge edges, whilethe movement towards and away from the stationary plate decreasesdownwardly. This greatly reduces wear and gives improved efficiency asthe downward component is not necessary until the rock has been reducedto small particles.

The sides 36 of the movable jaw overlap the edges of the stationary jaw,and these sides serve to protect the sides of the frame from abrasionand obviates the necessity of machined surfaces and liner plates.

A rock breaker like the one described above and shown on the drawingscan be easily set up at the place where it is to be used, and beingprovided with inclined jaws it can be made very low so that the rockscan be easily fed thereto, and by supplying it with a conveyor as shown,the discharge from the crusher jaws can be very low as the material willnot pile up beneath the laws.

What I claim and desire to secure by Letters Patent is:

A rock breaker comprising a housing having upwardly-ranging extensionsof its base providing runners for facilitating its sliding movement overa surface on which it rests and having a discharge outlet adjacent itsbottom and a feed inlet above the same, as oscillatory jaw disposed in 1an inclined position between the inlet and the outlet with its breakersurface uppermost, a stationary jaw disposed in overhanging relation tothe oscillatory jaw and having its breaker surface facing the latterjaw, the oscillatory jaw being 1 movable about an axis at its lower end,an eccentric journalled in the housing, a pitman on the eccentric inpivotal connection with and extending at right angles to the oscillatoryjaw, and a movable conveyor disposed above the bottom of the housingdirectly beneath the discharge outlet to receive the product descendingtherethrough.

CHARLES V. HALLENBECK.

